kernel_module_learn/02_module_params/test_module.c

#include <linux/module.h>
#include <linux/kernel.h>

static short int myshort = 1;
static int myint = 420;
static long int mylong = 9999;
static char *mystring = "blah";
static int myintarray[2] = { 420, 420 };
static int arr_argc = 0;

module_param(myshort, short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
MODULE_PARM_DESC(myshort, "A short integer");

module_param(myint, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
MODULE_PARM_DESC(myint, "An integer");

module_param(mylong, long, S_IRUSR);
MODULE_PARM_DESC(mylong, "A long integer");

module_param(mystring, charp, 0000);
MODULE_PARM_DESC(mystring, "A character string");

module_param_array(myintarray, int, &arr_argc, 0000);
MODULE_PARM_DESC(myintarray, "An array of integers");

static int __init module_params_init(void)
{
	int i;

	pr_info("myshort: %hd\n", myshort);
	pr_info("myint: %d\n", myint);
	pr_info("mylong: %ld\n", mylong);
	pr_info("mystring: %s\n", mystring);

	for (i = 0; i < ARRAY_SIZE(myintarray); i++)
		pr_info("myintarray[%d] = %d\n", i, myintarray[i]);

	pr_info("%d arguments for myintarray.\n", arr_argc);

	pr_info("Module avec paramètre chargé.\n");
	return 0;
}

static void __exit module_params_exit(void)
{
	pr_info("Module avec paramètre déchargé.\n");
}

module_init(module_params_init);
module_exit(module_params_exit);

MODULE_LICENSE("MIT License");
MODULE_AUTHOR("Florian RICHER");
MODULE_DESCRIPTION("Un module noyau avec paramètre déchargé.");
MODULE_VERSION("1.0");